Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
163
Chapter
7
Troubleshooting
Introduction
This chapter lists suggested diagnostic and corrective action procedures for
various common generator system malfunctions. If the suggested actions do not
resolve the anomaly, contact Rockwell Automation technical support.
Information on Rockwell Automation support can be found on the back cover.
This chapter does not include procedures to diagnose or correct issues that are
related to the basic communication between the CGCM-DLR unit and its host
Logix controller.
For assistance in the diagnosis of EtherNet/IP® DLR network communication
issues, refer to the EtherNet/IP Network Configuration Manual, publication
or EtherNet/IP Media Planning and Installation Manual ODVA
Pub. 148 and EtherNet/IP Network Infrastructure Guidelines ODVA Pub. 35
(1)
.
(1) For ODVA publications, see the ODVA EtherNet/IP library at
http://odva.org/Home/ODVATECHNOLOGIES/EtherNetIP/EtherNetIPLibrary/tabid/76/lng/en-US/Default.aspx
Table 19 - Excitation Control - FCR
Symptom
Most Likely Cause
Diagnostic Action
Corrective Action
No excitation current output
Excitation is not enabled
Check excitation enable (hardware
and software) and FCR select
Correct Logix controller logic or I/O
as required
Wiring error
Check wiring for excitation enable,
excitation current output, fuses
open, grounding, and PMG/supply
Correct wiring as required
No supply/PMG power
Measure Voltage at CGCM-DLR unit
PMG/supply input terminals
Correct supply anomaly if
insufficient voltage is measured
Excitation output is less than
setpoint
FCR not selected/enabled
Check excitation enable (hardware
and software) and FCR select
Correct Logix controller logic or I/O
as required
Wiring error
Check wiring for excitation enable,
excitation current output, fuses
open, grounding, and PMG/supply
Correct wiring as required
Insufficient supply power
Measure Voltage at CGCM-DLR unit
PMG/supply input terminals
Correct supply anomaly if
insufficient voltage is measured
Field resistance too great
Disconnect field current outputs at
CGCM-DLR unit and measure load
resistance
Correct/verify load resistance is
within CGCM-DLR unit capability
Gain mis-adjusted
Check gains that are entered into
CGCM-DLR unit configuration
Calculate/adjust as required